libata: implement more acpi filtering options

Currently libata-acpi can only filter DIPM among SATA feature enables
via _GTF.  This patch adds the capability to filter out FPDMA non-zero
offset, in-order guarantee and auto-activation.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 719e7d2..960c6a7 100644 (file)
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -22,7 +22,7 @@
 
 static unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT;
 module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644);
-MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock, 0x4=DIPM)");
+MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock, 0x4=DIPM, 0x8=FPDMA non-zero offset, 0x10=FPDMA DMA Setup FIS auto-activate)");
 
 #define NO_PORT_MULT           0xffff
 #define SATA_ADR(root, pmp)    (((root) << 16) | (pmp))
@@ -637,12 +637,23 @@ static int ata_acpi_filter_tf(const struct ata_taskfile *tf,
                        return 1;
        }
 
-       if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_DIPM) {
+       if (tf->command == ATA_CMD_SET_FEATURES &&
+           tf->feature == SETFEATURES_SATA_ENABLE) {
                /* inhibit enabling DIPM */
-               if (tf->command == ATA_CMD_SET_FEATURES &&
-                   tf->feature == SETFEATURES_SATA_ENABLE &&
+               if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_DIPM &&
                    tf->nsect == SATA_DIPM)
                        return 1;
+
+               /* inhibit FPDMA non-zero offset */
+               if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET &&
+                   (tf->nsect == SATA_FPDMA_OFFSET ||
+                    tf->nsect == SATA_FPDMA_IN_ORDER))
+                       return 1;
+
+               /* inhibit FPDMA auto activation */
+               if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_FPDMA_AA &&
+                   tf->nsect == SATA_FPDMA_AA)
+                       return 1;
        }
 
        return 0;

diff --git a/include/linux/ata.h b/include/linux/ata.h
index 7c5beaf..4fb3573 100644 (file)
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -334,9 +334,12 @@ enum {
        SETFEATURES_SATA_DISABLE = 0x90, /* Disable use of SATA feature */
 
        /* SETFEATURE Sector counts for SATA features */
+       SATA_FPDMA_OFFSET       = 0x01, /* FPDMA non-zero buffer offsets */
        SATA_FPDMA_AA           = 0x02, /* FPDMA Setup FIS Auto-Activate */
        SATA_DIPM               = 0x03, /* Device Initiated Power Management */
+       SATA_FPDMA_IN_ORDER     = 0x04, /* FPDMA in-order data delivery */
        SATA_AN                 = 0x05, /* Asynchronous Notification */
+       SATA_SSP                = 0x06, /* Software Settings Preservation */
 
        /* feature values for SET_MAX */
        ATA_SET_MAX_ADDR        = 0x00,

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 5b2f749..aa52794 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -423,6 +423,8 @@ enum {
        ATA_ACPI_FILTER_SETXFER = 1 << 0,
        ATA_ACPI_FILTER_LOCK    = 1 << 1,
        ATA_ACPI_FILTER_DIPM    = 1 << 2,
+       ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3,  /* FPDMA non-zero offset */
+       ATA_ACPI_FILTER_FPDMA_AA = 1 << 4,      /* FPDMA auto activate */
 
        ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
                                  ATA_ACPI_FILTER_LOCK |